Water splitting in near-neutral media: using an Mn–Co-based nanowire array as a complementary electrocatalyst

A Mn–Co–borate nanowire array on carbon cloth (Mn–Co–Bi/CC) acts as an efficient electrocatalyst for water oxidation with an overpotential of 366 mV to drive 10 mA cm −2 in 0.5 M K-Bi. The two-electrode electrolyser using Mn–Co–Bi/CC as the anode and MnCo 2 O 4 /CC as the cathode drives 10 mA cm −2 at 1.97 V.